So, I got my first set of wheels from otvto. It was custom made to my specific orders via chatting over AliExpress with them.
Basically these:
https://a.aliexpress.com/_EHA3ShgHub: H-works sr288c
Spokes: 3.8 mm carbon spokes with a maximal measured divination of 2,5% in spokes tension.
Rim: 40mm front, 50mm rear with 24mm internal.
Overall weight with sram xdr freehub 1230g.
Price 630€.with spare spokes and nipples.
Overall, i decided between Zed and DFs. Zen could not offer these spokes, and overall the price was about 300€ inkl. Shopping lower for about 100g higher weight. So I decided to give it a try.
Tbth, the rim could be a little bit lighter. They have not offered me a lightweight version, but perhaps there is one. There was failure on their side because they offered me a rim that was not available ever. So, I have forgotten to ask for a more lightweight rim profile.
Overall, really great communication, very responsive and pleased.
I have not ridden it yet.